Central diabetes insipidus happens when damage to a person's hypothalamus or pituitary gland causes disruptions in the normal production, storage, and release of vasopressin. 1  The disruption of vasopressin causes the kidneys to remove too much fluid from the body, leading to an increase in urination.
Foreign national A foreign national is a person who is not a citizen of the host country in which he or she is residing or temporarily sojourning. For example, a foreign national in Canada is someone who is neither a Canadian citizen nor a permanent resident of Canada. However, in the European Union, a foreign national is a third country national, i.e. someone who is not a citizen of any of the member states of the European Union.
For tax purposes the term U.S. national refers to individuals who were born in American Samoa or were born in the Commonwealth of the Northern Mariana Islands who have made the election to be treated as U.S. nationals and not as U.S. citizens. U.S. Citizen. 1  An individual born in the United States.